Learn JavaScript Coding vs ZeroDay Dev

Learn JavaScript Coding is a complete JavaScript learning environment designed for serious learners who want to master modern JavaScript, React, Node.js and real-world web development. This app combines a structured curriculum, interactive code playground, AI coding assistant and project-based learning so you can go from beginner to confident JavaScript developer using only your phone or tablet. LEARN MODERN JAVASCRIPT STEP BY STEP Start with the fundamentals and progress into modern ES6+ JavaScript: - Variables, functions, loops, objects and arrays - ES6+ features: arrow functions, destructuring, spread, classes, modules - Asynchronous JavaScript: callbacks, Promises, async/await - DOM manipulation and browser APIs - Best practices and clean coding patterns Every concept is broken into focused lessons with examples, questions and practical exercises so you actually understand how JavaScript works. FRONTEND FRAMEWORKS: REACT, VUE, ANGULAR, NEXT.JS Go beyond basics and learn the frameworks used in professional web development: - React: components, JSX, state, props, React Hooks, React Router - Next.js: file-based routing, server-side rendering and full stack React - Vue.js: reactivity, Composition API, components and state - Angular: TypeScript, RxJS, services and modular architecture - UI libraries like Chakra UI, Radix UI and shadcn/ui All are organized into dedicated sections so you can focus on the JavaScript ecosystem that matches your goals. BACKEND JAVASCRIPT: NODE.JS, EXPRESS AND MORE Learn how to build the backend using JavaScript and Node.js: - Node.js runtime basics and server-side JavaScript - Express.js for building APIs and REST endpoints - Koa, Hono, NestJS and other modern Node.js frameworks - Authentication with JWT and secure API design - Real-time communication with Socket.IO You will understand how full stack JavaScript fits together: frontend, backend and APIs. BUILT-IN CODE PLAYGROUND AND COMPILER Practice instantly with the integrated code editor and playground: - Run JavaScript and TypeScript code directly inside the app - Experiment with language features and algorithms - Test small React or frontend snippets - Learn faster by seeing live output while you read No laptop setup, no configuration, just open the app and start coding. AI CODING ASSISTANT Use the AI assistant as your personal JavaScript tutor: - Ask questions about JavaScript, React, Node.js and web development - Get explanations when you are stuck on a concept or error - Request alternative examples or best practice patterns - Use it alongside lessons and the playground for deeper understanding The AI assistant is tightly integrated with the learning flow to help you progress faster. DEEP JAVASCRIPT ECOSYSTEM COVERAGE Explore modern tools and libraries used in professional JavaScript development: - TypeScript for type-safe JavaScript - Redux and Redux Toolkit for state management - Zustand, RxJS and modern reactive patterns - Testing with Jest, Cypress and Playwright - Tooling with Vite and Webpack - Data visualization with D3.js and Chart.js - Desktop apps with Electron - Performance topics like WebAssembly Each topic is organized into focused sections with curated lessons. PROJECTS, TIPS, CHEAT SHEETS AND BEST PRACTICES Apply what you learn with: - Interactive JavaScript projects and mini apps - Framework and library specific sections for React, Node.js and others - Cheat sheets for JavaScript, React Hooks and TypeScript - Daily tips, best practices and “good to know” content - Progress tracking, streaks and completion stats Everything is designed to help you move from reading to building real things with JavaScript. WHO THIS APP IS FOR - Complete beginners who want to learn JavaScript from scratch - Frontend developers who want to add React, Vue, Angular or Next.js - Backend or other-language developers moving into Node.js - Anyone who wants a structured JavaScript and web development roadmap

Learn to break things—before attackers do. ZeroDay Dev teaches secure coding and blockchain security through 4,000+ hands-on challenges. Learn from 120+ real-world exploits: Beanstalk, Indexed Finance, bZx, VeilCash, Sigma.Money, Bybit, and more. Each exploit is linked to verified incident records so you learn from actual on-chain events, not hypotheticals. Practice — Build exploit intuition without reading docs. Tap vulnerable lines, drag tokens into code, get instant feedback. Filter by domain (Exploits, Solidity, Rust, DeFi, Solana) or difficulty. Exercises — Full code challenges with reference solutions. Deeper dives when you're ready. Exam — Prepare for real security assessments. Timed tests across domains with performance tracking. Memory-match decks for opcodes, EIPs, and security terms. Deep Dive Hub — Curated learning tracks for Web2, Web3, Rust, ZK Proofs, and Trading. Recommended tracks driven by your weak areas. Build your own from bookmarks or missed questions. Streaks & XP — Stay consistent and level up. Daily streaks, badges, and progression keep you coming back. Offline-first — Learn on the subway, no Wi‑Fi needed. All content lives on your device. No account required—start immediately. Covers reentrancy, oracle manipulation, flash loans, proxy races, ZK trusted setup, and more. Rust, Solidity, DeFi, Solana & cybersecurity.